besson



(No Model.)

. 4 SheetsShees 1. H. BESSON. APPARATUS FOR DRILLING BROOMS 0R BRUSHES.No. 487,362.

Patented Dec. 6, 1892.

(No Model.) 4 Sheets-Sheet 2. H. BESSON. APPARATUS FOR DRILLING BRQOMSOR BRUSHES.

No. 487,362. Patented Dec. 6, 1892;

IIIII Witnesses K1 (No Model.) 4 Sheets-Sheet :3. H. BESSON.

APPARATUS FOR DRILLING BROOMS OR BRUSHES.

No. 487,362. Patented Dec. 6,1892,

(Nd Model.) 4 Sheets-Sheet 4.

H. BESSON. APPARATUS FOR DRILLING BROOMS 0R BRUSHES. No. 487,362.Patented Dec. 6, 1892.

NITE STATES I-IYPPOLITE BESSON, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALFTO GEORGE HAROLD KENT, ARTHUR BARTON KENT, AND ERNEST WE'ILD KENT, OFSAME PLACE.

APPARATUS FOR DRILLINGBROOMS OR BRUSHES.

SPECIFICATION forming part of Letters Patent No. 487,362, dated December6, 1892..

Application filed June 18, 1892. Serial No. 436,511. (No model.)Patented in England December 22, 1890, N0. 20,897, and in FranceSeptember 28, 1891.110. 216,389.

To all whom it may concern.-

Be it known that I, HYPPOLITE BESSON, mechanical engineer, a subject ofthe Queen of Great Britain, residing at 4.6 Bonner Road, Bethnal Green,London,in the county of Middlesex, England, have invented certain newand useful Improvements in Apparatus for Drilling Brooms or Brushes,(for which I have received Letters Patent in Great 'Britain, No. 20,897,dated December 22, 1890, and in France, No. 216,389, dated September 28,1891,) of which the following is a specification.

{a This apparatus is of the class in which a number of drills havingequal cranks at their ends are carried in bearings in a plate, thecrank-pins working in hearings 'in another plate, every point of whichis caused to move in a circle, so that all the drills are rotatedsimultaneously. According to this invention this second plate is drivenby a single crank and is prevented from turning about the crank-pin bybeing so guided that at any time all points in it move parallel'to eachother. I guide the plate by means of a number of cranks equal in throwto the driving-crank, but which are not driven. These cranks carrycounterbalance-weights to balance their Weight and the weight of themoving plate. By this means a very steady motion, even at high speeds,is obtained. In cases where the drills, in place of being parallel toeach other, are all directed radially toward a common point each plateis a portion of a sphere having this point as its center. The crank-pinsof the drills also radiate to the same point. For producing holes whichare inclined to each other, but do not radiate to a single center,similar arrangements may be adopted, motion being given by a movingplate to a number of cranks whose shafts work in hearings in a fixedplate, as above described; butin this case the motion must be conveyedfrom the shafts to'the drills through universal joints or flexibleshafts. Difficulty is experienced in accurately boring the long smallholes in the fixed plate which form the bearings for the drills. In

order to obviate this difficulty, I build up the fixed plate with anumber of thin parallel plates, it being more easy to bore the holestruly in a thin than in a thick plate, and even if some of the holes insome of the plates are slightly inaccurate this error is corrected bythe other plates, the plates being capable of adjustment relatively toeach other by setscrews or other means.

In orderthat my said invention may be fully understood and readilycarried into effect, I will proceed to describe the drawings hereuntoannexed.

Figure 1 is a side elevation, partly'in section, of the drill-head of amultiple-drilling apparatus made in accordance with any invention. Fig.2 is a front elevation of a portion of the same. Figs. 3 and eshowdetails of one of the counterbalanced guiding-cranks.

Figs. 5, 6, and 7 show the driving-plateto a smaller scale. Fig. 8 is afront elevation, partly in section, of the compound bearing orpattern-journal in which the drills are carried. The parts on which thishearing is mounted are also shown. Fig. 9 is a horizontal section on theline X X, Fig. 8. Fig. 10 is an elevation, and Fig. 11 is a plan, partlyin section, of a drill-head forboringradial holes. Fig. 12 is anelevation, partly in section, of a drill-head for drilling holes, whichare inclined to each other but are not radial.

I will in the first place describe the mechanism shown by Figs. 1 to 9.a is a headstock. It is clamped fast upon a bed similar to a lathe-bed.The head-stock carries a shaft 1), which is rapidly rotated by a beltpassing around the pulley b. At the end of the shaft 1) there is a diskhaving fixed to it a crankpin b and the plate 0, which forms a partofthe driving-plate, is mounted upon the crankpin, the said pin beingreceived into a hushed hole in the plate 0. Upon the front face of thehead-stock a there are bosses ct. They are bored to receive bushings dd, and in the bushings are spindles e e, which can revolve freely. Thespindles e carry the guidingcranks for controlling the driving plate.Each guiding-crank consists of a cylindrical partf, fixed upon thespindle, and a light crank-pin f, fixed into the part f. The holes inthe plate a to receive the crank-pins f are suitably bushed. Thecylindrical part f of each controlling-crank has hollows Within it tolighten it on the side which receives the crank-pin f; but the part isthick and solid on the other side to counterpoise the weight of thedriving-plate and drill-cranks, so that there may be no preponderance ofthe moving parts in any direction. The plate 0 has jaws 0 upon it, andbetween these jaws another plate g, also forming part of thedriving-plate, is held. The plate 9 is slid down into its place betweenthe inclined surfaces of the jaws and is secured by bolts g g. The faceof the plate 9 is perforated with holes g 9 which accord in arrangementwith the holes to be bored in the brush-back. When a change is to bemade in the pattern of the work, the plate gis replaced by another platein which the arrangement of the holes is suitable. The pattermjournal ischanged simultaneously.

h h are the drills. Their stems are bent to form cranks corresponding inthrow to the cranks which actuate and control the driving-plate. Therear ends of the drill-stems are inserted into the holes g The plate ghas a cavity 9 within it, which is intended to contain grease, and thereis a movable back or lid 9 whch serves to close the cavity in rear.

g is a thin plate of hardened steel within the cavity g and on thisplate the stems of the drills abut. The pattern-journal consists of abox 1', in which is a series of plates '6'. These plates are bored withholes for the passage of the drills, and the plates are kept in place byfront and back cover-frames 2' 2 and by pressure-screws t tiwhich pressthe plates together. For the more accurate adjustment of the plates 2"screws 7c are provided in the ends of the box 1'. These screws act uponstrips 7t 70 within the box and press them forward, causing them to bearupon alternate plates. The interior of the box 1' may, when themachineis at work, be charged with grease.

Zis aperforated plate, supported at the'front of the box '5 by coiledsprings Z Z. When the work is pressed up toward the drills, the plateZyields freely, and when the work is withdrawn the plate Z comes forwardagain and clears the wood, dust, or dbris formed in the boring operationaway from the points of the drills.

The pattern-journal is mounted upon a saddle, which is clamped down tothe bed of the machine, but which when necesary can be adjusted in itsposition to and from the headstock. on m are standards rising from thissaddle. The box 2' is made with four lugs 2' 2' and T-headed boltsn 72pass through elongated holes in these lugs. The heads of the bolts n areheld in cavities prepared for them in the standards m.

0 o are adjusting-screws for adjusting the position of the box '6laterally, and p p are other screws by which it is supported at theright height. When it has been accurately set, the pattern-journal isclamped fast to the standards on m by tightening the nuts on the bolts nn.

In Figs. 10 and 11 the drills radiate from a central point, and insteadof being cranked or bent in themselves they are fixed into crankeddrill-stems, to which they are locked by means of set-screws. q q areplates in which are holes serving as bearings for these drill-stems. Thedriving-plate 1' has a face of spherical form, into which the crankedends of the drill-stems are also inserted, and the plate receives aspherical movement-that is to say, every point in the face of the plateis made to move in a path lying on the surface of a sphere and about thecommon center. The path in each case is circular and corresponds withthe throw of the cranked drillstems. The driving-plate is actuated bythe crank s on the shaft 8. There are also beltpulleys s s on theshafts. The controllingcrankst 25 also engage with the driving-plates,as the drawings show. The shafts t t of these cranks and the shaft 5 areall set radially to the common center. In order to insure smooth runningat high speeds, I provide cone-pulleys t fastened on the shafts t. Theyare arranged to be in light contact with another cone-pulley s which ismounted so that it can revolve freely on the shaft 5.

u is the pattern-journal. It is similar in its construction to thatalready described.

The pattern-journal is mounted on a slide on the saddle '1), which slidealso carries the work-holder'w, as seen in Fig. 10. This workholder isprovided with clamping-jaws and adjusting-screws, as before stated. Acam 00 advances the work-slide and holder toward the drills andwithdraws it when the drills have penetrated sufficiently deep. The camhas on its shaft a worm-wheel, with which a worm y engages. The worm isloose upon a shaft geared, as shown, with the shaft 8, and it can bemade fast with the shaft by a clutch .2 when the work is ready.

In Fig. 12 it willbe seen that the drill-cranks H are connected with thedrills h by intermediate spindles h which are each jointed with auniversal or gimbal joint at one end to the crank H and at the otherwith the head of the drill h. The stems of the drill-cranks H passthrough a plate X, and they are provided with collars H H on either sideof the plate. To cause the drills to penetrate the work, the plate X isdrawn forward by the lever-handle L. The cranks H are thereby drawnpartially out of the holes 9 in the plate g; but the passages aresufficiently longto prevent the cranks escaping altogether.

What I claim is- 1. A drilling apparatus comprising a series of crankedor bent drills, a driving-plate into which the cranked ends of thedrills are inserted, a single driving-crank for giving circular motionto the driving-plate, a series of freely-rotating guiding-cranks, andcounterbalance-weights for the guiding-cranks for compensating theweight of the driving-plate and crank-pins.

2. In drilling apparatus, the combination of a number of cranked or bentdrills, a driving-plate provided with holes for receiving the crankedends of the said drills, a fixed plate supporting thcbearing of a singledriven crank Whose crank-pin enters a hole in the driven plate, andbosses on the fixed plate, bored to receive pins fixed to a number offreelyrotating guiding-cranks, each consisting of a disk carrying acrank-pin entering a hole in the driven plate, the said disks beingrecessed, the walls of the recesses surrounding the bosses on the fixedplate and being of unequal thickness, so as to form counterbalance-Weights, balancing the weight of the drivingplate and crank-pins.

3. In drilling apparatus, the combination of a number of drills, meansfor simultaneously rotating the same, a compound bearing or patternjournal consisting of abox or holder containing a series of plates boredwith holes for the passage of the drills, and means for moving the saidplates laterally relatively the one to the other.

4. In drilling apparatus, the combination of a number of drills, meansfor simultaneously rotating the same, a compound bearing or patternjournal consisting of a box or holder containing a number of platesbored with holes for the passage of the drills, the edges of some ofsuch plates being in contact with one side of the box and the edges ofthe remainder in contact with the opposite side, means for causing-thesaid opposite sides to approach each other, and means for forcing thefaces of the said plates into contact with each other.

5. A drilling apparatus comprising a series of radially-arranged crankedor bent drills, a driving-plate for simultaneously rotating the drills,said driving-plate where it receives the drills having a face ofspherical form, and a driving-crank and guiding-rolls on radial shaftsfor giving a spherical movement to the driving-plate.

6. In drilling apparatus, the combination of a number of drills inclinedthe one to the other, a pattern journal in which the drills are set,intermediate spindles, each having one end connected bya universal jointto the end of one of the drills and the other end connected, also, by auniversal joint to the end of one of a number of crank-shafts, the endsof the said cranks being received into holes in a driving-plate, bywhich said shafts are simultaneously rotated, projections on. the saidshafts, a plate received between the said projections, and means formoving the said plate longitudinally.

I-IYPPOLITE BESSON.

Witnesses:

GEO. J. B. FRANKLIN, W. J. NORWOOD, Both of 17 Gracechurch Street,London, E. C.

